9000W really isn't that much, it's only around 40A. I could easily install that on my existing panel without upgrading my service, and I don't even use electricity for heating. Dealing with 9000W of heat is a much bigger challenge that providing electricity to GPU farm.

Not everyone use 240v. You might not need to upgrade your panel, but wiring isnt just your panel.

9000W really isn't that much, it's only around 40A. I could easily install that on my existing panel without upgrading my service, and I don't even use electricity for heating. Dealing with 9000W of heat is a much bigger challenge that providing electricity to GPU farm.

Not everyone use 240v. You might not need to upgrade your panel, but wiring isnt just your panel.

How many people in NA or Europe do you know without 240V service to their houses?

If you have 240V split phase it's relatively trivial to get a couple 240V lines brought out. It would cost me a $35 permit and a hour of work. If you wanted to get an electrician to do it, it would still only be a couple hundred bucks as long as you're not trying to run the lines all through your house. That's hardly major rewiring.

Lovely, lets also assume each GPU is watercooled as well (since you just pulled 2800MHash/s) But thats ok, i'm the owner of Koolance.

700 MHs is only like ~1100 MHz. You dont need to overvolt to achieve those numbers on air. I have 3 cards in my rig that did it. I'm sure others who own 7970s can chime in to the feasibility of this.

That's about the same as what I get. I'm running my 7970s at 1150 MHz now that the warmer weather is here. I was running them at 1250 MHz at stock voltages when it was cold out, the cards never went higher than 75C, and each card was well over 700 MH/s.

9000W really isn't that much, it's only around 40A. I could easily install that on my existing panel without upgrading my service, and I don't even use electricity for heating. Dealing with 9000W of heat is a much bigger challenge that providing electricity to GPU farm.

Not everyone use 240v. You might not need to upgrade your panel, but wiring isnt just your panel.

On normal 120v (single phase) it would be around 75 amps to support this. Most houses would need a major rewiring including decreasing the wire gauge to support this draw unless you used multiple 20 amp circuits on 14 gauge wire into your server room. On the other hand, if you used your dryer circuit which is usually 240 (2 phase), they are likely between 40 and 50 amp circuits and that would work as long at you used like 10 gauge wire or less into your room.